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在田间条件下 ,模拟 2 0 %平流层臭氧层的减薄 ,研究了增强紫外线 - B辐射 ( 2 80～ 32 0 nm)( UV- B)对 10个大豆品种生长、发育、色素和产量的影响。结果表明 :( 1)增强的 UV- B辐射使一些大豆品种的物候期发生改变。 ( 2 )明显降低多数品种光合作用色素和类胡萝卜素的含量 ,增加所有品种类黄酮类化合物的含量。 ( 3)大豆品种的株高、根茎叶生物量、总叶面积和总叶片数在 UV- B作用下减少 (或降低 ) ,根冠比发生改变。 ( 4 ) UV- B辐射降低了所有品种的产量 ,但百粒重的变化不尽一致。( 5)敏感性指数 ( SI)分析得出 ,890 7- 32 ( SI=- 33.9)是最敏感的品种 ,而对陇鉴 98- 0 1( SI=- 16.4 )的影响相对较小。
Under field conditions, the effects of enhanced UV-B radiation (280 ~ 320 nm) (UV-B) on the growth, development, pigment and yield of 10 soybean cultivars were studied under 20% stratospheric ozone depletion . The results showed that: (1) Enhanced UV-B radiation changed the phenology of some soybean varieties. (2) Significantly reduce the photosynthetic pigments and carotenoids content of most varieties, and increase the content of flavonoids in all varieties. (3) The plant height, rhizome biomass, total leaf area and total leaf number of soybean varieties decreased (or decreased) under UV-B, and the ratio of root to shoot changed. (4) UV-B radiation reduced the yield of all varieties, but the change of 100-grain weight was not consistent. (5) Sensitivity index (SI) analysis showed that 890-322 (SI = -33.9) was the most sensitive species, and had a relatively small influence on Longxian 98-10 (SI = -16.4).